Ridgid R7121 Drill, 1/2-Inch Spade Handle Mud Mixer 9 Amp heavy duty motor with hardened steel gears  insures tool longevity Triple gear reduction  increases torque for use with large diameter accessories Forward/reverse rocker switch  use for drilling or backing out jammed bits Easily accessible brushes  can be serviced quickly for minimum down time Lock-on button  for continuous drilling or mixing